Gasket for steam-boilers and coupling therefor



Patented May 2, |899. A. W. CHESTERTDN.

4HASKET FUR STEAM BOILEBS AND GOUPLING THEBEFOR.

(Application led June 3, 1898.) (No Model.)

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UNITED STATES PATENT EEicE.

ARTHUR W. OHESTERTON, OF BOSTON, MASSACHUSETTS.

GASKET FOR STEAM-'BOILERS AND COUPLING THEREFOR.

SPECIFICATION forming part of` Letters Patent No. 623,982, dated May 2,1899.

Application filed Time 3, 1898. Serial No. 682,510. (No model.)

T0 @ZZ whom, it may concern.-

Be it known that I, ARTHUR W. CHESTER- TON, of Boston, county ofSuffolk, State of Massachusetts,have invented certain new and usefulImprovements in Gaskets for Steam- Boilers and Couplings Therefor, ofwhich the following is a description.

The accompanying drawings show the gasket and coupling in severaldiiferent forms. Figure l shows an exposed section of the gasket. Fig. 2shows a cross-section of the gasket. Figs. 3, 4, and 5 show the couplingin the varying shapes in which it may be made. Fig. G shows a section ofthe gasket with the coupling in place.

My invention relates to an improvement in that class of joint andsteam-boiler gaskets usually made with a hollow core, the ends beingcoupled together.

My improvement consists chiefly in the material of which the gasket iscomposed, being a metallic body surrounded with suitable materials toresist heat, and in the style of couplings used.

I find that a gasket made with a center of woven, twisted, or braidedwire (preferably of woven wire) and having a compound of asbestos groundand thoroughly incorporated with rubber coated and laid on each side ofthe metallic body to give it elasticity and to cause it to conformitself more perfectly to the uneven surfaces of the joint makes a moresuitable gasket and will resist the pressures of steam better thangaskets as heretofore made.

B, Fig. l, represents the metallic body which I would use as the centerof my gasket; A, the inside coating of the compound before mentioned; O,the outer coating. These compounds could be rolled onto the metallicbody and the gasket afterward rolled into tubular form, or it could bemade into tubular form in any other or more convenient manner, as maysuggest itself.

I also ind that a solid coupling made larger i-n diameter at or near itsends than in its center will from its shape be held in its position bythe pressure of the joints. This coupling may be made in several shapes,such as shown in Figs. 3, 4, and 5 of the accompanying drawings, and inother shapes which. may vary from these particular kinds shown, withoutdeparting from the principle.

Heretofore in using tubular gaskets it has been found necessary to windthe ends of the gasket after being joined together with the couplingused with a piece of rubber tape. With the use of my improved couplingthis will not be necessary, as the pressure of the joints when broughttogether will cause the gasket to be forced onto the smaller part ofthecoupling-D, Fig. 3; d, Fig. 4; d d, Fig. 5--and so prevent it from beingforced out, and thus a tape will not be necessary to hold the ends ofthe gasket together.

My coupling being made solid and not hollow, as couplings haveheretofore been made, will retain its shape better under pressure andvbetter adapt itself to the shape of the gasket.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows:

l. A hollow gasket in cylindrical, elliptical, or rectangular form, madeof woven, twisted, or braided wire, and covered on both sides with acompound consisting of rubber and asbestos.

2. A gasket in cylindrical, elliptical, or rectangular form made ofwoven, twisted, or braided wire, and covered on both sides with acompound of rubber and asbestos, the gasket being made hollow so as toreceive a coupling which shall join its ends together.

3. A solid metallic coupling for tubular gaskets made in the form of theprinted English capital letter I, or in any form so that the diameter ofthe coupling will be larger at or near its ends than at its center.

ARTHUR W. OHESTERTON.

Witnesses:

GEORGE IISWETT, CHARLES B. DEvEREAUX.

